Progress in Inherited Retinal Disease Drug Discovery and Development: A Foundation's Perspective

Improving the effectiveness of SUD treatment through a national registry

CONTEXT

Recent research into the effectiveness of abstinence-based substance use disorder (SUD) treatment indicates that there has not been a substantial improvement since the Drug Abuse Treatment Outcome Study research in 1993. Research into medication-supported treatments for SUD are hindered by a dearth of real-world longitudinal outcome studies. Patient registries have dramatically improved survival rates in many diseases by providing researchers with longitudinal data on a broad spectrum of patients undergoing a variety of treatments. Policy prescription: We recommend the creation of a national registry for patients receiving treatment for SUD akin to the Surveillance, Epidemiology, and End Results Program established in 1971 to track cancer patient outcomes. One option would be to expand the data currently being collected in the Treatment Episode Data Set (TEDS) to include all nonpublicly funded treatment and to allow for longitudinal tracking of deidentified individuals. Information on medication use and deaths could be kept up to date through integrations with state-wide death registries and Prescription Drug Monitoring Programs. The TEDS dataset already undergoes extensive data deidentification to make sure individuals cannot be identified prior to releasing the admissions and discharge datasets to researchers. Once longitudinal tracking is available, even more stringent deidentification will be necessary, and access to the dataset would be restricted to public health researchers.

CONCLUSION

The development of a registry of individuals undergoing treatment for SUD can be expected to enhance our understanding of the progression of the disease and the relative effectiveness of different treatment modalities for patients with different drug use histories and characteristics.

Intravitreal Polymeric Nanocarriers with Long Ocular Retention and Targeted Delivery to the Retina and Optic Nerve Head Region

Posterior eye tissues, such as retina, are affected in many serious eye diseases, but drug delivery to these targets is challenging due to various anatomical eye barriers. Intravitreal injections are widely used, but the intervals between invasive injections should be prolonged. We synthesized and characterized (¹H NMR, gel permeation chromatography) block copolymers of poly(ethylene glycol), poly(caprolactone), and trimethylene carbonate. These polymers self-assembled to polymersomes and polymeric micelles. The mean diameters of polymersomes and polymeric micelles, about 100 nm and 30–50 nm, respectively, were obtained with dynamic light scattering. Based on single particle tracking and asymmetric flow field-flow fractionation, the polymeric micelles and polymersomes were stable and diffusible in the vitreous. The materials did not show cellular toxicity in cultured human umbilical vein endothelial cells in the Alamar Blue Assay. Pharmacokinetics of the intravitreal nanocarriers in the rabbits were evaluated using in vivo fluorophotometry. The half-lives of the polymersomes (100 nm) and the micelles (30 nm) were 11.4–32.7 days and 4.3–9.5 days. The intravitreal clearance values were 1.7–8.7 µL/h and 3.6–5.4 µL/h for polymersomes and polymeric micelles, respectively. Apparent volumes of distribution of the particles in the rabbit vitreous were 0.6–1.3 mL for polymeric micelles and 1.9–3.4 mL for polymersomes. Polymersomes were found in the vitreous for at least 92 days post-dosing. Furthermore, fundus imaging revealed that the polymersomes accumulated near the optic nerve and retained there even at 111 days post-injection. Polymersomes represent a promising technology for controlled and site-specific drug delivery in the posterior eye segment.

An optometrist's guide to the top candidate inherited retinal diseases for gene therapy

This review presents the phenotypic and genotypic profiles of a select group of inherited retinal diseases (IRDs) that are currently the focus of retinal gene therapy trials globally. Research progress in IRD treatment trials may soon lead to their availability in Australia and New Zealand, as either approved treatment or a clinical trial. The salient clinical characteristics of retinitis pigmentosa-the largest IRD category-are highlighted, with specific reference to RPE65-associated Leber congenital amaurosis, followed by other specific IRDs, namely choroideremia and ABCA4-associated Stargardt disease. These IRDs are selected based on their candidacy for gene therapy. Guidance on the clinical diagnostic tests that support each of these diagnoses will be presented. More broadly, the most useful structure and function measures to monitor IRD progression is discussed, along with the key assessments that offer differential diagnostic insight. This review is intended to be a clinical guide for optometrists, to assist in assessment and management of individuals who may be eligible for current and future gene therapies. A companion article in this issue will provide an overview of the basic principles of gene therapy and its development as a new treatment for inherited retinal diseases.

Drug discovery and drug marketing with the critical roles of modern administration

Drug research and development is a long-term and complicated process with the involvement of multidisciplinary, multi-sector cooperation and regulations of the Food and Drug Administration (FDA). It is of high risk, high cost, high benefit and time-consuming. Therefore, the drug administration and management is extremely necessary and useful. We discussed the whole process including laboratory study, target determination, drug discovery and screening, leading compound and optimization, preclinical and clinical trials, FDA approval and marketing. Actively exploring and applying modern administration and innovative management technology, we can scientifically and effectively enhance the discovery of new drug research and development, and strengthen the supervision of drug market. In recent years, innovation such as artificial intelligence has been applied to drug discovery and drug administration. We further analyzed the possibility of applying management technology to reduce risks, generate profits and benefit patients in the whole process of new drug research and development. In conclusion, drug administration and management plays critical roles in modern drug research and development, and the new technology can be helpful for drug launching.